Function literal is now expression and function simultaneously for purposes of annotation target checking

compiler/testData/diagnostics/tests/annotations/options/functions.kt

@@ -0,0 +1,16 @@
+@Target(AnnotationTarget.FUNCTION)
+annotation class FunAnn
+
+fun bar(arg: () -> Int) = arg()
+
+@FunAnn fun gav() = 13
+
+fun foo(arg: Int) {
+    // Literal is annotatable
+    bar @FunAnn { arg }
+    // Function expression too
+    val f = @FunAnn fun(): Int { return 42 }
+    // But here, f and gav should be annotated instead
+    bar(<!WRONG_ANNOTATION_TARGET!>@FunAnn<!> f)
+    bar(<!WRONG_ANNOTATION_TARGET!>@FunAnn<!> ::gav)
+}